Infineon Technologies CY14V101QS-SF108XIT

Overview

CY14V101QS-SF108XIT from Cypress Semiconductor is a 1-Mbit (128K × 8) Quad SPI nonvolatile SRAM with SONOS Quantum Trap technology, operating at up to 108 MHz interface speed and delivering 54 MBps read/write bandwidth. It integrates volatile SRAM and nonvolatile storage in a single die, supports AutoStore on power-down via VCAP capacitor, and operates across –40 °C to 105 °C for extended industrial applications including real-time data logging in programmable logic controllers.

For engineers reviewing the CY14V101QS-SF108XIT datasheet, CY14V101QS-SF108XIT pinout, CY14V101QS-SF108XIT application, or CY14V101QS-SF108XIT equivalent, key selection criteria include QPI/SPI/DPI mode flexibility, hardware STORE/RECALL via HSB pin, 20-year data retention at 85 °C, dual-voltage operation (VCC 2.7–3.6 V / VCCQ 1.71–2.0 V), and support for burst wrap and XIP read modes.

Technical Context

The CY14V101QS-SF108XIT implements a hybrid memory architecture where all read/write operations target the SRAM array, while STORE/RECALL commands transfer data between SRAM and embedded SONOS FLASH cells. Its QPI interface uses four I/O lines (I/O0–I/O3) with opcodes enabling quad-data-rate transfers at up to 108 MHz, supporting burst wrap and continuous XIP reads.

Power management includes two low-power states: Sleep (280 µA avg @ 85 °C) and Hibernate (8 µA avg @ 85 °C), controlled via SPI instructions. The HSB pin serves dual function - outputting STORE busy status (active-low) and accepting external hardware STORE trigger (pulled low), enabling deterministic nonvolatile write initiation independent of software flow.

Key Specifications

Pinout & Package

Package: 16-pin SOIC (standard pinout per Figure 1, Document 001-85257 Rev. *M).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar nvSRAM applications.

Compared with FM25V10-G and MB85RS1MT, the CY14V101QS-SF108XIT uniquely delivers deterministic power-loss resilience via VCAP + HSB, 20-year retention, and 108 MHz QPI bandwidth-making it optimal for industrial control systems where data integrity cannot depend on host software timing.

Availability

CY14V101QS-SF108XIT is available at Aetrix Electronics and suitable for industrial data loggers, programmable logic controllers, railway signaling units, and medical infusion pump controllers requiring stable component supply and long-lifecycle support.

Supply support for CY14V101QS-SF108XIT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Cypress Semiconductor (now part of Infineon Technologies) designs high-reliability memory and microcontroller solutions for industrial, automotive, and IoT applications, with global manufacturing and quality certifications.

The CY14V series targets mission-critical embedded systems needing seamless SRAM performance with nonvolatile backup-specifically engineered for applications where power interruption must not compromise data integrity or system restart time.

FAQ

What is the role of the VCAP pin, and what capacitor value is recommended?

The VCAP pin supplies hold-up energy to complete AutoStore during power loss. Cypress specifies a 4.7 µF ±20% tantalum or ceramic capacitor rated ≥6.3 V, placed within 5 mm of the pin with low-ESR design. Connecting VCAP to ground violates absolute maximum ratings and may permanently damage the device.

Can the CY14V101QS-SF108XIT operate in standard SPI mode without using QPI or DPI features?

Yes-it supports standard SPI mode (single I/O) at up to 40 MHz with zero-cycle latency for READ/WRITE. All QPI/DPI functionality is disabled by default; enabling requires issuing QPIEN instruction. Standard SPI retains full STORE/RECALL, block protection, and low-power mode support.

How does hardware STORE differ from software STORE in terms of timing and reliability?

Hardware STORE initiates immediately upon HSB pin falling edge and completes within tSTORE (max 10 ms), independent of SPI bus activity. Software STORE requires active CS and valid opcode transmission, making it subject to bus contention. Hardware STORE is preferred for fail-safe logging where host MCU may be unresponsive during power collapse.

Is the 8-byte serial number truly one-time programmable, and can it be read after programming?

Yes-the serial number is stored in OTP memory and can be written once using WRSN instruction. Subsequent WRSN attempts are ignored. It is readable indefinitely via RDSN or FAST_RDSN instructions, providing immutable device identity for secure boot or regulatory traceability.